US6236326B1 - Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone - Google Patents

Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone Download PDF

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Publication number
US6236326B1
US6236326B1 US09/430,143 US43014399A US6236326B1 US 6236326 B1 US6236326 B1 US 6236326B1 US 43014399 A US43014399 A US 43014399A US 6236326 B1 US6236326 B1 US 6236326B1
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United States
Prior art keywords
wireless telephone
battery
wireless
telephone
network
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Expired - Lifetime
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US09/430,143
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English (en)
Inventor
Paul A. Murphy
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VTech Telecommunications Ltd
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VTech Telecommunications Ltd
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Priority to US09/430,143 priority Critical patent/US6236326B1/en
Priority to EP00309509A priority patent/EP1096762A3/de
Priority to CA002324697A priority patent/CA2324697C/en
Assigned to VTECH TELECOMMUNICATINS, LTD. reassignment VTECH TELECOMMUNICATINS, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MURPHY, PAUL
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/006—Call diverting means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Cellular and wireless telephones have become important and ubiquitous tools of communication in today's society.
  • Cellular and wireless telephones provide a convenient means by which a subscriber to services offered by a cellular or wireless communication services network provider/operator can speak with others by telephone from nearly any place at nearly any time.
  • a subscriber can conveniently be contacted by friends, family, or business associates by their dialing the telephone number assigned to the subscriber by the cellular/ wireless network operator no matter where the subscriber may be located within the geographical region served by the operator.
  • wireless telephones While cellular and wireless telephones (collectively “wireless telephones”) have greatly facilitated communications among individuals, certain aspects of their operation continue to limit their effectiveness.
  • One such limiting aspect of wireless telephones is their limited battery life. Because the batteries within the telephone are frequently exhausted, they must either be exchanged for a fresh battery, or recharged. However, of ten times users do not carry a fresh fully charged battery with them due to the inconvenience. Recharging a battery when attached to the phone typically precludes its use during such time and more importantly precludes it from being carried with the subscriber. Furthermore, users sometimes forget or fail to notice that their telephone battery is low and in need of recharging.
  • the telephone will cease to operate.
  • the cellular and/or wireless network will detect that the cellular subscriber is no longer “on-line” and will terminate the connection such that the other party to the call perceives being abruptly disconnected.
  • the party with whom the subscriber was speaking accordingly does not know how or why the telephone conversation has been terminated.
  • the other party may be confused or misled as to is why the conversation terminated. That party may mistakenly believe that the subscriber “hung up” on him or her. That party may needlessly worry that the subscriber encountered trouble or was involved in some kind of accident, if for example, the subscriber was speaking from an motor vehicle.
  • That party may further become frustrated upon futilely attempting to contact the subscriber by dialing the subscriber's wireless telephone number while the telephone is without power.
  • the cellular telephone battery becomes discharged while the user is not engaged in a telephone conversation, for example while either powered off or during standby mode, the user may not realize that the battery has ceased to power the phone such that important telephone calls may go unanswered.
  • a user who keeps a wireless telephone in a briefcase or coat pocket would likely not notice when the cellular telephone ceases to function after its battery is depleted.
  • the other party will consequently be informed of the nature of the call interruption, and can take action accordingly.
  • a subscriber could set his wireless telephone such that calls are forwarded to another predetermined telephone number, such as his office telephone number, when his telephone battery fails.
  • an individual at the subscriber's office such as a secretary, may then answer calls to the subscriber's telephone number, handle important matters and take appropriate alternative actions to contact the subscriber if necessary.
  • This invention consists of a wireless telephone which automatically takes action to reduce the inconvenience of wireless telephone battery depletion immediately prior to the batteries running out of energy. Specifically, if a telephone call is not in progress when a battery nears depletion, the invention contacts the wireless telephone network and initiates call forwarding to a different number. If a telephone call is in progress when a battery nears depletion, the invention plays an audible message to the party with whom the wireless subscriber is speaking, thereby informing the party that the wireless connection will soon be lost.
  • the invention consists of a wireless telephone.
  • the wireless telephone detects that its battery is nearly out of energy, the wireless telephone plays a predetermined voice message out to the other party.
  • the wireless telephone allows the user to record a personal voice message in memory.
  • the wireless telephone transmits a signal enabling call forwarding to the wireless network just before the wireless telephone battery runs out of energy while a telephone call is not in progress.
  • This invention assures that calls directed to the subscriber's wireless telephone number can be received at a different number while the subscriber's wireless telephone remains unpowered due to battery failure.
  • the invention may also automatically contact the wireless telephone network and disable the forwarding of telephone calls directed to the subscriber's wireless telephone number when the telephone is re-powered after replacing or recharging a failed battery.
  • FIG. 1 is a schematic block diagram of one embodiment of the invention, whereby the wireless telephone can record a low battery notification message, and play the notification message when the battery nears depletion.
  • FIG. 2 is a schematic block diagram of another embodiment of the invention, whereby the wireless telephone can enable call forwarding when a battery nears depletion, and can cancel call forwarding when the telephone is powered on following depletion of a battery.
  • FIG. 1 of the drawings illustrates an embodiment of the present invention comprising a wireless telephone.
  • the telephone sends a previously recorded notification to the other party when the call is in imminent danger of termination due to depletion of the telephone's rechargeable battery pack.
  • the schematic block diagram of FIG. 1 illustrates only the elements of the wireless telephone which are specifically referenced in this invention. In order to clarify the present invention, further detail as to the operation and design of wireless telephones is not included because such detail is well known in the art and not necessary to understand this invention.
  • control circuit 23 conveys the voice data on to transmitter 28 , which formats the voice data along with control data received from wireless telephone controller 27 , modulates it, and transmits the signal at RF frequencies according to a wireless radio protocol for which the telephone is designed.
  • the particular digital radio protocol used e.g. CDMA, TDMA, FHSS, etc. is unimportant to this invention, as the invention will function similarly for any digital protocol.
  • Battery monitor circuit 25 monitors the level of energy remaining in rechargeable battery pack 26 .
  • Battery monitor circuit 25 detects a predetermined level of energy remaining in battery pack 26 , a signal is sent to voice data control circuit 23 .
  • Circuits which monitor the energy remaining in a rechargeable battery pack are well known in the art, and their exact configuration and operation will depend heavily on the type of rechargeable battery used in the electronic device. Consequently, the details of this circuit are not important to the present invention and will not be described in detail.
  • the level of remaining energy at which the battery monitor circuit 25 will send a signal to control circuit 23 is at least equal to the amount of energy required to complete a desired function—in this case, transmit a previously recorded voice notification message.
  • the precise energy level at which battery monitor 25 will generate its signal will depend upon the power consumption characteristics of the wireless telephone with which this invention is implemented, and the discharge characteristics of the rechargeable battery pack used in the design. Furthermore, choice of battery monitor “trigger point” will involve a tradeoff between triggering earlier, at a higher level, to ensure sufficient energy remains in battery pack 26 to complete transmission of the notification message in all conditions, and triggering later, at a lower energy level, to maximize the useful operating time of the wireless telephone.
  • control circuit 23 When voice data control circuit 23 receives a signal from battery monitor 25 , control circuit 23 will begin to retrieve the previously recorded voice notification message data out of nonvolatile memory 24 , toward being subsequently formatted and transmitted by transmitter 28 . The other calling party is thereby notified by ‘playback’ of the pre-recorded message that the call is about to be terminated due to depletion of the wireless telephone battery pack 26 .
  • the notification message is stored in nonvolatile memory 24 . It is contemplated, and thus within the scope of the present invention, that the user will be provided with the capability to record his or her own message. To this end, the user may speak into the telephone whereby voice data control circuit 23 can write digital voice data from voice coder 22 representative of the user's voice into nonvolatile memory 24 . In one embodiment of this feature, a user might use the standard wireless telephone user interface to initiate the notification message recording mode through software. The wireless telephone controller 27 would cause voice data control circuit 23 to enter a recording mode, in which the user would speak into microphone 20 .
  • voice data control circuit 23 may include a threshold detector circuit, which would stop the writing of voice data into nonvolatile memory 24 upon detecting that the amplitude of the digitized voice signal has fallen below a threshold level for a predetermined period of time, thus indicating that the user has finished speaking the notification message.
  • the message played back to the other party to the call may be a standard ‘pre-recorded’ message programmed into the telephone's memory during manufacture.
  • FIG. 2 illustrates another embodiment of the present invention.
  • This invention comprises a wireless telephone which causes telephone calls directed to the telephone number to be redirected to a different telephone number when the telephone's rechargeable battery pack reaches a low energy level such that depletion of the battery pack is imminent and/or the level drops to the point where the telephone may no longer function.
  • the schematic block diagram of FIG. 2 illustrates only the elements of the wireless telephone which are specifically referenced in this invention. Further detail as to the operation and design of wireless telephones is not included in order to clarify the present invention, and because such detail is well known in the art and not necessary the understanding of this invention.
  • battery monitor circuit 25 monitors the level of energy remaining in rechargeable battery pack 26 .
  • a signal is generated and sent to wireless telephone controller 27 .
  • the level of remaining energy at which the battery monitor circuit 25 will send a signal to controller 27 is at least equal to the amount of energy required to complete the desired function—in this case, initiate a cellular or wireless telephone connection to the cellular/wireless telephone network and communicate a forwarding telephone number.
  • the precise predetermined point at which battery monitor 25 will generate its signal will depend upon a variety of factors, and it is contemplated that the telephone designer or user would configure the telephone appropriately.
  • controller 27 Upon receipt by wireless telephone controller 27 of a signal from battery monitor 25 indicating impending depletion of battery 26 , controller 27 initiates a connection with the wireless telephone network. Controller 27 then transfers a previously programmed forwarding telephone number to the wireless network, according to the appropriate procedure as specified by the service provider. This procedure typically merely involves the transmission to the network of a required series of DTMF tones with or without pauses. Finally, controller 27 causes the telephone to terminate the connection with the wireless telephone network. Call forwarding is thereby enabled, and any calls placed thereafter to the subscriber's wireless telephone are automatically redirected by the telephone network operation to the forwarding number programmed into the telephone. The operation of wireless telephones, and telephone forwarding services, are well known in the art and therefore will not be described in detail.
  • call forwarding is terminated when the user powers on the telephone after replacing or recharging the depleted battery pack.
  • controller 27 detects whether call forwarding was enabled during the previous user due to battery depletion.
  • wireless telephone controller 27 sets a flag in nonvolatile memory 24 following the transfer of the previously programmed forwarding telephone number to the wireless telephone network, and before the battery is depleted, to indicate that call forwarding has been enabled.
  • controller 27 queries this flag. If the flag indicates that call forwarding has been enabled, controller 27 resets the flag and initiates a connection with the wireless telephone network. Call forwarding is then canceled through the appropriate procedure as specified by the wireless service provider, and the wireless telephone is then disconnected from the network.
  • This procedure mirrors that used to activate call forwarding, and likewise typically consists of transmitting a series of DTMF tones.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)
US09/430,143 1999-10-29 1999-10-29 Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone Expired - Lifetime US6236326B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US09/430,143 US6236326B1 (en) 1999-10-29 1999-10-29 Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone
EP00309509A EP1096762A3 (de) 1999-10-29 2000-10-27 Verfahren und Vorrichtung zur intelligenten Signalisierung des Batterieladezustands in einem schnurlosen Telefon
CA002324697A CA2324697C (en) 1999-10-29 2000-10-30 Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone

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US09/430,143 US6236326B1 (en) 1999-10-29 1999-10-29 Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone

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